The Niobrara River corridor dominates this Knox County landscape, where the braided river system and the Missouri National Recreational River converge. This 2014 survey captures the distinct water management and drainage patterns of the region, including the Mormon Canal and numerous tributaries such as Verdigre Cr and Bingham Cr. The town of Niobrara sits at the northern edge, near the confluence of these major waterways, while the settlement of Ponca and the Pisel Reservoir are situated further south among the upland ridges.
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This is the sole edition of this map. No revisions or reprints were ever made.
1950 · Niobrara
USGS Topo · 1:24,000
1950 · Verdel
USGS Topo · 1:24,000
1950 · Verdigre NE
USGS Topo · 1:24,000
1950 · Pishelville
USGS Topo · 1:24,000
1954 · Walnut
USGS Topo · 1:24,000
1954 · Verdigre
USGS Topo · 1:24,000
1955 · Sioux City
USGS Topo · 1:250,000
1955 · O'Neill
USGS Topo · 1:250,000
1958 · Sioux City
USGS Topo · 1:250,000
1959 · O'Neill
USGS Topo · 1:250,000